[PATCH RFC 67/77] rapidio: Update MSI/MSI-X interrupts enablement code

Alexander Gordeev
2013-10-02T10:49:23Z

As result of recent re-design of the MSI/MSI-X interrupts enabling
pattern this driver has to be updated to use the new technique to
obtain a optimal number of MSI/MSI-X interrupts required.

Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
---
drivers/rapidio/devices/tsi721.c | 27 +++++++++++++++++----------
1 files changed, 17 insertions(+), 10 deletions(-)

diff --git a/drivers/rapidio/devices/tsi721.c b/drivers/rapidio/devices/tsi721.c
index ff7cbf2..5edd920 100644
--- a/drivers/rapidio/devices/tsi721.c
+++ b/drivers/rapidio/devices/tsi721.c
@@ -734,6 +734,16 @@ static int tsi721_enable_msix(struct tsi721_device *priv)
int err;
int i;

+ err = pci_msix_table_size(priv->pdev);
+ if (err < 0)
+ goto err_out;
+ if (err < ARRAY_SIZE(entries)) {
+ dev_info(&priv->pdev->dev,
+ "Only %d MSI-X vectors available, not using MSI-X\n",
+ err);
+ return -ENOSPC;
+ }
+
entries[TSI721_VECT_IDB].entry = TSI721_MSIX_SR2PC_IDBQ_RCV(IDB_QUEUE);
entries[TSI721_VECT_PWRX].entry = TSI721_MSIX_SRIO_MAC_INT;

@@ -769,16 +779,8 @@ static int tsi721_enable_msix(struct tsi721_device *priv)
#endif /* CONFIG_RAPIDIO_DMA_ENGINE */

err = pci_enable_msix(priv->pdev, entries, ARRAY_SIZE(entries));
- if (err) {
- if (err > 0)
- dev_info(&priv->pdev->dev,
- "Only %d MSI-X vectors available, "
- "not using MSI-X\n", err);
- else
- dev_err(&priv->pdev->dev,
- "Failed to enable MSI-X (err=%d)\n", err);
- return err;
- }
+ if (err)
+ goto err_out;

/*
* Copy MSI-X vector information into tsi721 private structure
@@ -833,6 +835,11 @@ static int tsi721_enable_msix(struct tsi721_device *priv)
#endif /* CONFIG_RAPIDIO_DMA_ENGINE */

return 0;
+
+err_out:
+ dev_err(&priv->pdev->dev,
+ "Failed to enable MSI-X (err=%d)\n", err);
+ return err;
}
#endif /* CONFIG_PCI_MSI */

--
1.7.7.6